Details zur Publikation

Kategorie Textpublikation
Referenztyp Zeitschriften
DOI 10.14471/2015.35.002
Titel (primär) Demography of the alpine pioneer species Saxifraga aizoides in different successional stages at the glacier foreland of the Rotmoosferner (Obergurgl, Ötztal, Austria)
Autor Winkler, E.; Marcante, S.; Erschbamer, B.
Quelle Tuexenia
Erscheinungsjahr 2015
Department OESA
Band/Volume 35
Seite von 267
Seite bis 283
Sprache englisch
Keywords colonization, demography, fecundity, matrix model, mortality, population growth rate, primary succession
UFZ Querschnittsthemen RU5;
Abstract The demography of the alpine pioneer species Saxifraga aizoides was investigated along a succes-sional gradient at the Rotmoos glacier foreland (2,330–2,450 m a.s.l., Obergurgl, Ötztal, Austria) from recently deglaciated areas to advanced successional stages. A basic hypothesis of our study was that fecundity might play an essential role for population growth rate on the youngest site and become of minor importance at advanced successional stages. A matrix modelling approach was performed to calculate the main demographic parameters on 6, 33, and 81 year old moraines. Our results partly confirmed the prediction of the larger role of fecundity on the youngest sites. Here, seedling mortality was lower compared to the older sites, and the reproductive success was significantly higher. All in all, Saxifraga aizoides mainly follows a “persistence strategy” from the beginning, characterized by the fact that large individuals did not undergo mortality at the recently deglaciated site. However, in the long term a population decline will occur due to plant age and changes of environmental conditions along the successional gradient.
dauerhafte UFZ-Verlinkung https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=16650
Winkler, E., Marcante, S., Erschbamer, B. (2015):
Demography of the alpine pioneer species Saxifraga aizoides in different successional stages at the glacier foreland of the Rotmoosferner (Obergurgl, Ötztal, Austria)
Tuexenia 35 , 267 - 283 10.14471/2015.35.002